Two samples from my Tahoe. In my infinite wisdom I forgot to write down what oil did I use for the latest OCI. I only use PP, Castrol Ti or Edge, and QSUD. This is not Castrol, as there's no Ti. Most likely QSUD, but the additives don't match the previous sample. Oh well... Maybe someone has better idea by looking at the ad pack.
In both cases the OLM was at 23%. The latest run involved 4,000km trip in a week, right before the oil change.
Both oils were boosted my LiquiMoly MoS2, about half a bottle.
Cu, as usual, is most likely from the oil cooler. AFM is tuned out, the engine does not use any measurable amount of oil in OCI. I also have double-stage catch can, in addition to improved latest and greatest driver-side valve cover.
I need to talk to WearCheck about the meaning of the numbers at the bottom, they look confusing to me.
Code:
Date 5/28/2016 9/5/2017
Oil Km 7300 9891
Unit Km 69088 87118
Oil QSUD 5w30 ???
Fe 19 16
Cr 1.1 0.8
Mn 2.6 1.3
Ni 0.3 0
Ti 0 0
Ag 0 0
Al 4.4 4.3
Pb 1.5 1.2
Cu 54 47
Sn 0.2 0.1
Sb 1.1 1.4
V 0 0
Si 22 17
Na 5.9 6.8
Ka 1.4 1.3
B 25 2
Ba 0.1 0.2
Mo 287 313
Mg 501 26
Ca 1125 1923
P 578 627
Zn 638 735
S 1888 2320
Li 0.1 0.2
Oxidation (PA) 61 73
Nitration (PA) 61 59
Sulfation (PA) 59 81
AntiWear 15.1 18.1
Infra-red Glycol0 0.1
Infra-red Water 23.6 27.6
IR (EP H2O) 82 119
IR (Synth BD1) 1.1 4.30
IR (Synth BD2) 0 0
Infra-red Fuel 234.90 216.4
IR (Gasoline) 0.00 0
IR (Other) 15.4 15.9
Visc @ 100C 10.1 10.6
What do you guys think?
In both cases the OLM was at 23%. The latest run involved 4,000km trip in a week, right before the oil change.
Both oils were boosted my LiquiMoly MoS2, about half a bottle.
Cu, as usual, is most likely from the oil cooler. AFM is tuned out, the engine does not use any measurable amount of oil in OCI. I also have double-stage catch can, in addition to improved latest and greatest driver-side valve cover.
I need to talk to WearCheck about the meaning of the numbers at the bottom, they look confusing to me.
Code:
Date 5/28/2016 9/5/2017
Oil Km 7300 9891
Unit Km 69088 87118
Oil QSUD 5w30 ???
Fe 19 16
Cr 1.1 0.8
Mn 2.6 1.3
Ni 0.3 0
Ti 0 0
Ag 0 0
Al 4.4 4.3
Pb 1.5 1.2
Cu 54 47
Sn 0.2 0.1
Sb 1.1 1.4
V 0 0
Si 22 17
Na 5.9 6.8
Ka 1.4 1.3
B 25 2
Ba 0.1 0.2
Mo 287 313
Mg 501 26
Ca 1125 1923
P 578 627
Zn 638 735
S 1888 2320
Li 0.1 0.2
Oxidation (PA) 61 73
Nitration (PA) 61 59
Sulfation (PA) 59 81
AntiWear 15.1 18.1
Infra-red Glycol0 0.1
Infra-red Water 23.6 27.6
IR (EP H2O) 82 119
IR (Synth BD1) 1.1 4.30
IR (Synth BD2) 0 0
Infra-red Fuel 234.90 216.4
IR (Gasoline) 0.00 0
IR (Other) 15.4 15.9
Visc @ 100C 10.1 10.6
What do you guys think?